Answer:
directional selection
Explanation:
The directional selection is a type of Darwinian selection where a particular phenotype is favored in the population, thereby modifying the allelic frequencies to increase the proportion of the favored phenotype. <em>Biston betularia</em>, also known as peppered moth, is a species that was influenced by directional selection in its recent past. Before the industrial revolution, the frequency of light-colored moths was predominant compared to the darker-colored phenotypes, because this color has higher adaptive fitness in a clean, no pollution environment, thereby light-colored moths were able to avoid predatory birds. However, during the industrial revolution, the frequency of dark-colored moths increased in response to pollution (i.e. darker environment), thereby conferring a higher adaptive fitness to darker phenotypes.
Answer:
Explanation:
Grunion are the two species of genus Leuresthes. that are L. tenuis and L. sardinas. The species are found in the coasts of California. These species reproduce by external fertilization. The tides plays important role in reproduction of these species.
The females come on the sandy shores of the beach where they lay their eggs in the sand during high tides. The males wrap themselves around the females and secrete their sperms. The eggs remains hidden inside the sand for 10 days. With the next set of high tides, the eggs hatch and young grunions move towards the sea.
Answer:
Dinitrogen is the most common form. It makes up 78 percent of the atmosphere but cannot be used by plants. It is taken into the soil by bacteria, some algae, lightning, and other means.
Explanation:
How the chromosomes aligned on the metaphase plate during meiosis
Lands, water, air, hydrosphere , and all the organisms that live on top of it
, hopefully that helped you??..